header {
    position: fixed;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-justify-content: space-between;
    justify-content: space-between;
    -webkit-align-items: center;
    align-items: center;
    top: 0;
    width: 100%;
    z-index: 100000000000;
    height:2.25rem;
    background: rgba(255,255,255,1);
}
.bottom_normal {
    width: 100%;
    height: 15rem;
    /*position: fixed;*/
    bottom: 0;
    padding-top: 1rem;
    background: #333333;
}
.company-tips {
    margin: 1rem 1.6rem;
    color: #333333;
    font-size: 0.8rem;
    line-height: 1.5rem;
    text-align: justify;
}
.bottom_great_width {
    width: 100%;
    padding-bottom: 1.5rem;
    padding-top: 1rem;
    background: #333333;
}